Nipple enhancement

Nipples can be made firmer, thicker, and maybe a little longer with fat grafting or dermal filling (transient). If you really want significant length, some kind of reconstructive procedure will be needed involving transfer of tissue/grafting to your existing nipple. Perhaps stretching using 'barbells' could be done to lengthen it and then fill with fat as a less extreme procedure. Best to see a local board certified plastic surgeon for an exam and if the above is not mentioned, you could bring it up to their attention and thoughts and criticisms.